Device on transformers for preventing the decomposition of oil by the oxygen contained in air.



A. AIGHELE. DEVICE 0N TRANSFORMERS FOR PREVENTING THE DECOMPOSITION OF OIL BY THE OXYGEN CONTAINED IN AIR. APPLIGATIONIILED 3110.15, 1911.

' 1,088,197. Patented Feb. 24, 1911 q btesif; [raven Z5?" @f ockma Albert Jaw/Ida,

1/. 4 I) 7%idli/JQQLMM/Q/ w bulk thereof and the air of a diaphragm or v ALBERT IcnELE, or BADEN, s'w rrznnnenn,

ASSIGEIOR TO .AETIENGESELICSCHLTT BROWN BOVERI & cm, or SFl'lZEELANB.

DEVICE ON TRANSFORlVIERS Application filed December 15, 1911,

FOR 'EREVENTING THE DECOMPCSI OXYGEN CONTAIIQ'ED IN AIR.

Specification of Iietters Patent.

To all whom it may concern. Be it known that L ALBERT Aronnnn, citizen of the Swiss Republic,

at-Baden, Switzerland, have invented a certain new and useful Device on Tinusformers for Preventing the Decomposition of Oil by: the Oxygen Contained. in Air of which the following is a specification.

This invention relates to protection of oil in transformers contact with normal or heated air. In transformers in which oil is employed difficulties arise due to this in practice which ordinarily necessitate hermetically sealing the transformer box to prevent oxidation of the oil. r

The object of the'present invention is to provide an improved method and means for this purpose which does not require the transformer- The invention consists in tneprovision between the transformer oil' or the main the like With or Without a further quantity of oil, means also being I expansion of the 01l on'heating 1s permitted.

to take place Without causing injury or rise of pressure.

Referring to the accompanying diagram matic drawings, Figure 1 "shows one manner of applying the invention to an air cooled transformer, and-Fig. 2 to a water cooled transformer.

In the form of the invention illustrated in Fig. 1, the transformer coils indicated by Z) are placed inside a containing case a -thr ugh the cover 0 oi which are passed the bobbin leads. Thecover 0 does not form a hermetic closure with the case a,- holes e being provided through which air can-pass inside the case. The case a is substantially filled with oil but sufiicient room is left to "permit the oil to expand on heating. space f above the surface of the oil'there is provided material such as cork, a non-conductor of heat and electricity and lighter than oil. TWith transformer o'fthis kind air can be freely passed through the venti- 1 lating holes a Without seriously affecting the hot oil and the expansion of this. oil .on

and residing from oxidization due to box to be sealedhermetically.

provided whereby In the.

l l 1 i 1 l i l plate or slab or anuini, r

' ters Patent is:- c I '1 The combinatloniw-ith "casing provided with apertures, a body of r m: or on 13y This Serial 110. 665,896..

heating can readily move the non-conductmg rrass g,'which maybeformed of a single a of such piates.

the IGZIIl or he nvention shown in Fig. 3. a moi ed system is applied to a c atter cooled transfcrmer. in this case a diaphragn'i- 5, which may be "of wood is ar ranged at some littlede'pth below the surface of the oil-and perforated to permit expansion of the oil on heatinf Vwater cooling coils h are provided'and-these can be arranged. as snown both in the main hulk of the oil below the diaphragm" and the In. operation this small part of.

part above.

the oil abo fe the diaphragm constitutes a seal and-hence no oxidation can take place of the oil below the diaphragm. Further any condensed water that may occur at the top of the case cannot travel down, because of the diaphragm, tothe transformer coils. both forms of the nvention the top surracesor the insulators 'gand are substantially, cold and hence there is .no'temt ency for oxidation of the chief part ofthe oil. r

n willbe endgame that the jn'aodifications illustrated-j given by wav of exa leoniy.- y

Having now I claim as new and desire to secure by Let a transformer oil contained therein-and electrical windings below the surface of said oil, of a dia' 1 Fee. as, 1914.-

ntally and in proximity with the described my invention what 3.111 combination a transformer casing provided With-apertures, a body of oil contained therein, electrical windings below the surface of snfic} oil, a horizontally disposed dia hragm 0 leat insulating material sup 7 v por t ecl slightly below and in proximity with ALBERT AICHELE' VVitnes s es':

IIARRYveA MOBRIDE, AUGUST RijEGG.

nalne'to this specification in the presence of two subscrlblng wltnesses.

5 the upper" surface of the oil, substahtially' as described.

In testimonywhereof I have signed my 

